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Alkali doped aromatic compounds have shown evidence of metallic and superconducting phases whose precise nature is still mysterious. In potassium and rubidium doped phenanthrene, superconducting temperatures around 5 K have been detected,…

Materials Science · Physics 2014-08-28 S. Shahab Naghavi , Erio Tosatti

A detailed investigation of mesoscopic magnetic and crystallographic phase separation in Ca(1-x)La(x)MnO3, 0.00<=x<=0.20, is reported. Neutron powder diffraction and DC-magnetization techniques have been used to isolate the different roles…

Materials Science · Physics 2009-11-10 C. D. Ling , E. Granado , J. J. Neumeier , J. W. Lynn , D. N. Argyriou

We have carried out a systematic study on the effect of Cu doping on nuclear, magnetic, and dielectric properties in Mn$_{1-x}$Cu$_{x}$WO$_4$ for ${0}\leq{x}\leq{0.19}$ by a synergic use of different techniques, viz, heat capacity,…

Strongly Correlated Electrons · Physics 2015-08-31 C. M. N. Kumar , Y. Xiao , P. Lunkenheimer , A. Loidl , M. Ohl

The complex lanthanide doping of electron manganites results in enhancement of various phase separation effects in physical properties of these compounds. Selecting Ca0.8Sm0.16Nd0.04MnO3 as a model case we show that the first order…

Strongly Correlated Electrons · Physics 2009-11-10 D. A. Filippov , K. V. Klimov , R. Z. Levitin , A. N. Vasil'Ev , T. N. Voloshok , R Suryanarayanan

We present a systematic study of the interplay between lattice parameters and the energy of the optical phonons as well as the antiferromagnetic coupling strength, $J$, in the high-$T_{\text{c}}$ superconducting cuprate…

Strongly Correlated Electrons · Physics 2019-04-24 Silvia Müllner , Wayne Crump , Dirk Wulferding , Benjamin P. P. Mallett , Peter Lemmens , Amit Keren , Jeffery L. Tallon

Using first-principles density functional theory calculations, we investigate the geometries, electronic structures, and thermodynamic stabilities of substitutionally doped phosphorene sheets with group III, IV, V, and VI elements. We find…

Computational Physics · Physics 2016-03-17 Weiyang Yu , Zhili Zhu , Chun-Yao Niu , Chong Li , Jun-Hyung Cho , Yu Jia

Since advanced Silicon-based device components are moderately chemically tunable, doped graphene has emerged as a promising candidate to replace this semiconducting material in flexible miniaturized electronic devices. Indeed, heteroatom…

Materials Science · Physics 2022-10-27 Laura Caputo , Viet-Hung Nguyen , Jean-Christophe Charlier

Two-dimensional graphene exhibits many fascinating properties such as ballistic electronic conduction and quantum Hall effect at room temperature.1-4 Graphene doped electrochemically or through charge-transfer with electron-donor and…

High-energy-resolution core-level and valence-band photoelectron spectroscopic studies were performed for the heavy Fermion uranium compounds UGe2, UCoGe, URhGe, URu2Si2, UNi2Al3, UPd2Al3, and UPt3 as well as typical localized and itinerant…

The contribution of $O^{2-}$ ions to antiferromagnetism in $La_{2-x}Ae_xCuO_4$ ($Ae = Sr, Ba)$ is highly sensitive to doped holes. In contrast, the contribution of $Cu^{2+}$ ions to antiferromagnetism in $Nd_{2-x}Ce_xCuO_{4+y}$ is much less…

General Physics · Physics 2017-02-20 Manfred Bucher

Chemical doping is a critical factor in the development of new superconductors or optimizing the superconducting transition temperature (Tc) of the parent superconducting materials. Herein, a new simple urea approach is developed to…

We present a new way to tune the electron-phonon coupling (EPC) in graphene by changing the deformation potential with electron/hole doping. We show the EPC for highest optical branch at the high symmetry point K, acquires a strong…

Materials Science · Physics 2011-05-03 Claudio Attaccalite , Ludger Wirtz , Michele Lazzeri , Francesco Mauri , Angel Rubio

New electrode materials for alkaline-ion batteries are a timely topic. Among many promising candidates, V2O5 is one of the most interesting cathode materials. While having very high theoretical capacity, in practice, its performance is…

The exploration of magnetism in two-dimensional layered materials has attracted extensive research interest. For the monoclinic phase CrI3 with interlayer antiferromagnetism, finding a static and robust way of realizing the intrinsic…

Materials Science · Physics 2022-11-30 Shiyang Sun , Xuyan Chen , Xuqi Li , Huihui Zhang , Haidan Sang , Shifei Qi , Zhenhua Qiao

This study presents a detailed quantum chemical investigation of the electronic and excited-state properties of syn- and anti-isomers of the borane cluster B18H22 and their sulfur-doped derivatives. Using the PB86/def2-SVP level of theory…

Atomic and Molecular Clusters · Physics 2026-01-06 Fakher Abbas , Nabil Joudieh , Habib Abboud , Nidal Chamoun

We have found that Ce3Pd20As6 crystallizes into a cubic C6Cr23-type structure. Combination of electron probe microanalysis of the chemical composition and Rietveld analysis of the powder X-ray diffraction pattern has revealed an…

Strongly Correlated Electrons · Physics 2014-10-30 K. Orita , K. Uenishi , M. Tsubota , Y. Shimada , T. Onimaru , T. Takabatake , J. Kitagawa

We have elucidated the nature of the electron correlation effect in uranium compounds by imaging the partial $\mathrm{U}~5f$ density of states (pDOS) of typical itinerant, localized, and heavy fermion uranium compounds by using the…

The spectral properties of a one-dimensional (1D) single-chain Mott insulator Sr$_2$CuO$_{3}$ have been studied in angle-resolved photoemission and optical spectroscopy, at half filling and with small concentrations of extra charge doped…

Strongly Correlated Electrons · Physics 2008-03-04 T. Valla , T. E. Kidd , P. D. Johnson , K. W. Kim , C. C. Homes , G. D. Gu

We present muon spin rotation ($\mu$SR) and susceptibility measurements on single crystals of isoelectronically doped URu$_{2-x}$T$_x$Si$_2$ (T = Fe, Os) for doping levels up to 50\%. Zero Field (ZF) $\mu$SR measurements show long-lived…

Strongly Correlated Electrons · Physics 2016-02-02 M. N. Wilson , T. J. Williams , Y. -P. Cai , A. M. Hallas , T. Medina , T. J. Munsie , S. C. Cheung , B. A. Frandsen , L. Liu , Y. J. Uemura , G. M. Luke

Mixed solid compounds are employed in a vast array of applications so an accurate determination of their chemical compositions is of crucial importance. All current characterization methods require specially-treated samples so the…

Materials Science · Physics 2024-04-03 Miao Miao Zhao , Yang Yang , Na Du , Yu Ying Zhu , Peng Ren , Fei Yen